<template>
	<div class="cart">
		<h4>全部商品</h4>
		<div class="cart-main">
			<div class="cart-th">
				<div class="cart-th1">全部</div>
				<div class="cart-th2">商品</div>
				<div class="cart-th3">单价（元）</div>
				<div class="cart-th4">数量</div>
				<div class="cart-th5">小计（元）</div>
				<div class="cart-th6">操作</div>
			</div>
			<div class="cart-body">
				<ul class="cart-list" v-for="item in cartInfoList" :key="item.id">
					<li class="cart-list-con1">
						<input type="checkbox" name="chk_list" :checked="item.isChecked" @change="updateChecked(item)" />
					</li>
					<li class="cart-list-con2">
						<img :src="item.imgUrl" />
						<div class="item-msg">{{ item.skuName }}</div>
					</li>

					<li class="cart-list-con4">
						<span class="price">{{ item.cartPrice }}.00</span>
					</li>
					<li class="cart-list-con5">
						<a href="javascript:void(0)" class="mins" @click="handle('minus', -1, item)">-</a>
						<input
							autocomplete="off"
							type="text"
							:value="item.skuNum"
							minnum="1"
							class="itxt"
							@change="handle('change', $event.target.value * 1, item)"
						/>
						<a href="javascript:void(0)" class="plus" @click="handle('add', 1, item)">+</a>
					</li>
					<li class="cart-list-con6">
						<span class="sum">{{ item.skuNum * item.cartPrice }}</span>
					</li>
					<li class="cart-list-con7">
						<a class="sindelet" @click="deleteCart(item.skuId)">删除</a>
						<br />
						<a href="#none">移到收藏</a>
					</li>
				</ul>
			</div>
		</div>
		<div class="cart-tool">
			<div class="select-all">
				<input class="chooseAll" type="checkbox" :checked="isAllChecked" @change="allCheck" />
				<span>全选</span>
			</div>
			<div class="option">
				<a @click="deleteAllCheckedCart">删除选中的商品</a>
				<a href="#none">移到我的关注</a>
				<a href="#none">清除下柜商品</a>
			</div>
			<div class="money-box">
				<div class="chosed">
					已选择 <span>{{ AllNum.a }}</span
					>件商品
				</div>
				<div class="sumprice">
					<em>总价（不含运费） ：</em>
					<i class="summoney">{{ AllNum.b }}</i>
				</div>
				<div class="sumbtn">
					<a class="sum-btn" @click="goTrade">结算</a>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
import { mapGetters } from 'vuex';
import throttle from 'lodash/throttle';
export default {
	name: 'ShopCart',
	mounted() {
		this.getDate();
	},
	computed: {
		...mapGetters(['cartList']),
		// 购物车数据
		cartInfoList() {
			return this.cartList.cartInfoList || [];
		},
		/**
		 * 判断底部全选复选框是否勾选
		 */
		isAllChecked() {
			let isCheck = null;
			isCheck = this.cartInfoList.every(item => item.isChecked == 1);
			if (this.cartInfoList.length < 1) {
				isCheck = false;
			}
			return isCheck;
		},
		/**
		 * 返回选择几件商品和价格
		 */
		AllNum() {
			let num = {};
			let allCheck = this.cartInfoList.filter(item => {
				return item.isChecked == 1;
			});
			let a = 0;
			let b = 0;
			allCheck.forEach(item => {
				a += item.skuNum;
				b += item.skuPrice * item.skuNum;
			});
			num.a = a;
			num.b = b;
			return num;
		}
	},
	methods: {
		/**
		 * 获取购物车数据
		 */
		getDate() {
			this.$store.dispatch('getCartList');
		},
		/**
		 * 修改某一个商品的数量方法
		 */
		handle: throttle(async function (type, num, item) {
			// type:区分点击的是哪一个
			// num，修改数量
			// item，商品id
			// 向服务器发送求，修改数量
			switch (type) {
				case 'add':
					num = 1;
					break;
				case 'minus':
					// 如果商品此时数量大于1，那么可以正常减1，否则不加不减
					num = item.skuNum > 1 ? -1 : 0;
					break;
				case 'change':
					// 输入的非数字
					if (isNaN(num) || num < 1) {
						num = 0;
					} else {
						num = parseInt(num) - item.skuNum;
					}
					break;
			}
			try {
				// 成功
				await this.$store.dispatch('addOrUpdateShopCart', { skuId: item.skuId, skuNum: num });
				this.getDate();
			} catch (error) {
				console.log(error);
			}
		}, 2000),

		/**
		 * 删除购物车中某一个商品
		 */
		async deleteCart(skuId) {
			try {
				await this.$store.dispatch('getDeleteCart', skuId);
				this.getDate();
			} catch (error) {
				console.log(error);
			}
		},
		/**
		 * 修改商品选中状态的方法
		 */
		async updateChecked(item) {
			try {
				await this.$store.dispatch('updateChecked', {
					skuID: item.skuId,
					isChecked: item.isChecked == 1 ? 0 : 1
				});
				this.getDate();
			} catch (error) {
				console.log(error);
			}
		},
		/**
		 * 删除全部选中的商品功能
		 */
		async deleteAllCheckedCart() {
			try {
				await this.$store.dispatch('deleteAllCheckedCart');
				this.getDate();
			} catch (error) {
				console.log(error);
			}
		},
		/**
		 * 全选全不选功能
		 */
		async allCheck(e) {
			let isChecked = e.target.checked == true ? 1 : 0;
			try {
				await this.$store.dispatch('updateAllChecked', isChecked);
				this.getDate();
			} catch (error) {
				console.log(error);
			}
		},
		/**
		 * 跳转到trade页面
		 */
		goTrade() {
			this.$router.push({
				path: '/trade',
				query: {
					skuNum: this.AllNum.a,
					skuPrice: this.AllNum.b
				}
			});
		}
	}
};
</script>

<style lang="less" scoped>
.cart {
	width: 1200px;
	margin: 0 auto;

	h4 {
		margin: 9px 0;
		font-size: 14px;
		line-height: 21px;
	}

	.cart-main {
		.cart-th {
			background: #f5f5f5;
			border: 1px solid #ddd;
			padding: 10px;
			overflow: hidden;

			& > div {
				float: left;
			}

			.cart-th1 {
				width: 25%;

				input {
					vertical-align: middle;
				}

				span {
					vertical-align: middle;
				}
			}

			.cart-th2 {
				width: 25%;
			}

			.cart-th3,
			.cart-th4,
			.cart-th5,
			.cart-th6 {
				width: 12.5%;
			}
		}

		.cart-body {
			margin: 15px 0;
			border: 1px solid #ddd;

			.cart-list {
				padding: 10px;
				border-bottom: 1px solid #ddd;
				overflow: hidden;

				& > li {
					float: left;
				}

				.cart-list-con1 {
					width: 15%;
				}

				.cart-list-con2 {
					width: 35%;

					img {
						width: 82px;
						height: 82px;
						float: left;
					}

					.item-msg {
						float: left;
						width: 150px;
						margin: 0 10px;
						line-height: 18px;
					}
				}

				.cart-list-con3 {
					width: 10%;

					.item-txt {
						text-align: center;
					}
				}

				.cart-list-con4 {
					width: 10%;
				}

				.cart-list-con5 {
					width: 15%;

					.mins {
						border: 1px solid #ddd;
						border-right: 0;
						float: left;
						color: #666;
						width: 6px;
						text-align: center;
						padding: 8px;
					}

					input {
						border: 1px solid #ddd;
						width: 40px;
						height: 33px;
						float: left;
						text-align: center;
						font-size: 14px;
					}

					.plus {
						border: 1px solid #ddd;
						border-left: 0;
						float: left;
						color: #666;
						width: 6px;
						text-align: center;
						padding: 8px;
					}
				}

				.cart-list-con6 {
					width: 12.5%;

					.sum {
						font-size: 16px;
					}
				}

				.cart-list-con7 {
					width: 12.5%;

					a {
						color: #666;
					}
				}
			}
		}
	}

	.cart-tool {
		overflow: hidden;
		border: 1px solid #ddd;

		.select-all {
			padding: 10px;
			overflow: hidden;
			float: left;

			span {
				vertical-align: middle;
			}

			input {
				vertical-align: middle;
			}
		}

		.option {
			padding: 10px;
			overflow: hidden;
			float: left;

			a {
				float: left;
				padding: 0 10px;
				color: #666;
			}
		}

		.money-box {
			float: right;

			.chosed {
				line-height: 26px;
				float: left;
				padding: 0 10px;
			}

			.sumprice {
				width: 200px;
				line-height: 22px;
				float: left;
				padding: 0 10px;

				.summoney {
					color: #c81623;
					font-size: 16px;
				}
			}

			.sumbtn {
				float: right;

				a {
					display: block;
					position: relative;
					width: 96px;
					height: 52px;
					line-height: 52px;
					color: #fff;
					text-align: center;
					font-size: 18px;
					font-family: 'Microsoft YaHei';
					background: #e1251b;
					overflow: hidden;
				}
			}
		}
	}
}
</style>
